// 头部
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: #fff;
    background-color: palevioletred;
    font-size: 20px;
    height: 44px;
    padding: 0 10px;
    a:nth-child(1) {
        color: #fff;
        font-size: 25x;
    }
    a:nth-child(3) {
        width: 34px;
        height: 34px;
        background: url("../images/header_app.png");
        background-size: 34px 34px;
    }
}

// 底部
footer {
    background-color: #f1f1f1;
    .footer_top {
        display: flex;
        border-top: 1px solid #c4c4c4;
        border-bottom: 1px solid #c4c4c4;
        text-align: center;
        height: 35px;
        line-height: 35px;
        margin-top: 25px;
        font-size: 14px;
        >span:nth-child(1) {
            flex: 3;
            border-right: 1px solid #c4c4c4;
        }
        >span:nth-child(2) {
            flex: 3;
            border-right: 1px solid #c4c4c4;
        }
        .back {
            flex: 4;
            img {
                margin-top: 9px;
                margin-left: 55px;
                float: left;
                height: 14px;
                width: 14px;
                vertical-align: middle;
            }
            >span {
                float: left;
            }
        }
    }
    .footer_content {
        .footer_link {
            margin-top: 18px;
            display: flex;
            justify-content: center;
            a {
                display: inline-block;
                margin-right: 3px;
                height: 20px;
                &:nth-child(1) {
                    color: red;
                }
                &:nth-child(3) {
                    color: #757575;
                }
            }
        }
        p {
            font-size: 10px;
            text-align: center;
            margin-bottom: 20px;
        }
    }
}